Subtract 90/40 from 20/56
1st number: 20/56, 2nd number: 2 10/40
20/56 - 90/40 is -53/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
20/56 = 20 × 5/56 × 5 = 100/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
90/40 = 90 × 7/40 × 7 = 630/280 - Subtract the two like fractions:
100/280 - 630/280 = 100 - 630/280 = -530/280 - After reducing the fraction, the answer is -53/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56-90/40 20/56-90/80 60/56-90/40